Add Run A Git Command From Outside The Repo as a git til

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://tinyletter.com/jbranchaud).
 
-_1088 TILs and counting..._
+_1089 TILs and counting..._
 
 ---
 
@@ -272,6 +272,7 @@ _1088 TILs and counting..._
 - [Renaming A Branch](git/renaming-a-branch.md)
 - [Resetting A Reset](git/resetting-a-reset.md)
 - [Resolve A Merge Conflict From Stash Pop](git/resolve-a-merge-conflict-from-stash-pop.md)
+- [Run A Git Command From Outside The Repo](git/run-a-git-command-from-outside-the-repo.md)
 - [Set A Custom Pager For A Specific Command](git/set-a-custom-pager-for-a-specific-command.md)
 - [Show All Commits For A File Beyond Renaming](git/show-all-commits-for-a-file-beyond-renaming.md)
 - [Show Changes For Files That Match A Pattern](git/show-changes-for-files-that-match-a-pattern.md)

git/run-a-git-command-from-outside-the-repo.md

@@ -0,0 +1,20 @@
+# Run A Git Command From Outside The Repo
+
+Generally you run a git command from somewhere within the parent folder where
+the `.git` directory lives. Git recognizes the `.git` directory in that parent
+directory and runs your command against it.
+
+You can run a command against a given git repository without being within the
+parent directory. This can be handy for scripting as well as for one-off
+commands when you don't want to `cd` to the directory. To do this, you need to
+tell Git where to find the `.git` directory. You do this with the `-C` flag.
+
+For instance, from anywhere on my machine, I can view a log of this TIL
+repository with the following:
+
+```bash
+$ git -C ~/code/til log
+```
+
+Notice that the `-C` flag and its argument are positioned directly after `git`.
+The command (`log`) should be positioned after that.